Questions about helicopter's path could prove key in Pentagon probe of midair crash

Among the unanswered questions about the crash near Washington, D.C., are the flight pattern of the Black Hawk helicopter and the exact nature of its training exercise.

Questions about helicopter's path could prove key in Pentagon probe of midair crash
Emergency response units work at the site of the American Airlines plane that crashed into the Potomac River on Wednesday on approach to Reagan National Airport.

Among the unanswered questions about the crash near Washington, D.C., are the flight pattern of the Black Hawk helicopter and the exact nature of its training exercise.

(Image credit: Al Drago)